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ONSEMI NCP1239JD65R2G Current-Mode Flyback Controller
The NCP1239 is a fixed-frequency current-mode controller designed for flyback converters and offline power supplies. Offering low standby power and high efficiency, it operates at 65 or 100 kHz with frequency foldback down to 26 kHz during light load conditions. Features include internal slope compensation, a high-voltage start-up current source, adjustable over-power protection, and fault detection circuits such as short-circuit and overload protection. It supports open-frame power supplies, adapters, and various electronic devices, ensuring reliable operation through thermal shutdown and brown-out detection, and is pin-compatible with similar controllers.
ONSEMI NCP1239JD65R2G Current-Mode Flyback Controller Specifications:
- Switching Frequency: 65 kHz or 100 kHz with frequency foldback down to 26 kHz
- Operation Voltage Range: Up to 35 V
- Peak Current Drive Capability: +500 mA
- Soft-Start Duration: 8 ms (internal)
- Thermal Shutdown Threshold: 150°C with 20°C hysteresis
- Vcc Operating Range: 12 V to 35 V
- Overpower Protection: Adjustable via HV pin sensing
- Brown-Out Detection: Supported internally via HV pin
- Fault Detection: Short-circuit, overload, over-voltage, over-temperature
- Protection Modes: Latched or auto-recovery options available
- PWM Mode: Fixed frequency with jittering for EMI reduction
- Oscillator Frequency: 65 kHz or 100 kHz versions available
- Maximum Junction Temperature: 150°C
- Package Type: SOIC-7
- Compliance: RoHS and Pb-Free
Buy the Buy ON Semiconductor NCP1239JD65R2G Online
Purchase the ON Semiconductor NCP1239JD65R2G online now and enhance your power supply designs. This fixed-frequency current-mode controller offers superior efficiency, robust fault detection, frequency foldback, and thermal safety features. Ideal for offline AC-DC adapters, flyback converters, and electronic applications requiring low standby power and high reliability. Designed for easy integration with pin compatibility, it ensures stable operation across varying input voltages with internal protections for overloads and over-voltage scenarios. Order today and ensure your device’s power conversion is authoritative and dependable.
Get ON Semiconductor NCP1239JD65R2G today—built for precise flyback control, high efficiency, and reliable fault protection in power supply designs.
Frequently Asked Questions
Where can I buy ONSEMI NCP1239JD65R2G?
You can click on the BUY or RFQ button to purchase NCP1239JD65R2G from an authorized ONSEMI distributor.
How do I troubleshoot issues or seek technical support for part NCP1239JD65R2G?
You can download the NCP1239JD65R2G datasheet or visit the ONSEMI website for support.
Who is the manufacturer of NCP1239JD65R2G?
ONSEMI